Light-condensing device and method of fabricating the same

Abstract

A light-condensing device and a method of fabricating the same are provided. The light-condensing device includes a central block, a pair of vertical diffraction grating blocks respectively located left and right of the central block, and a pair of horizontal diffraction grating blocks respectively located above and below the central block. The vertical diffraction grating blocks include parallel vertical diffraction gratings in the form of lines extending in the direction of a vertical axis, and the horizontal diffraction grating blocks include parallel horizontal diffraction gratings in the form of lines extending in the direction of a horizontal axis.

1. A solar cell module comprising:
 a solar cell array substrate on which a plurality of solar cells are arranged; and 
 a light-condensing device array substrate located on the solar cell array substrate; 
 wherein the light condensing device array substrate includes a plurality of unit light-condensing devices, 
 wherein each unit light-condensing device includes:
 a central block; 
 a pair of vertical diffraction grating blocks respectively located left and right of the central block, and comprising parallel vertical diffraction gratings in the form of lines extending in the direction of a vertical axis; and 
 a pair of horizontal diffraction grating blocks respectively located above and below the central block, and comprising parallel horizontal diffraction gratings in the form of lines extending in the direction of a horizontal axis, 
 
 wherein a pair of the plurality of unit light-condensing devices adjacent in the horizontal axis share the vertical diffraction grating block, and a pair of the plurality of unit light-condensing devices adjacent in the vertical axis share the horizontal diffraction grating block, and 
 wherein a center of each solar cell is aligned with the central block of a corresponding one of the unit light-condensing devices. 
 
     
     
       2. The solar cell module according to  claim 1 ,
 wherein the unit light-condensing device further comprises diagonal diffraction grating blocks located adjacent to four corner of the central block and comprising rectangular hexahedron diffraction gratings, and four unit light-condensing devices adjacent in the horizontal axis and vertical axis direction share one diagonal diffraction grating block, 
 wherein a light incident on each of the diagonal diffraction is diffracted in four diagonal direction. 
 
     
     
       3. The solar cell module according to  claim 2 , wherein each of the diagonal diffraction grating blocks includes rectangular hexahedron diffraction gratings arranged diagonally. 
     
     
       4. The solar cell module according to  claim 3 , wherein the material of the light condensing device is glass, polymethylmethacrylate(PMMA) or polycarbonate. 
     
     
       5. The solar cell module according to  claim 3 , a width of the rectangular hexahedron diffraction gratings is narrower than a width of the parallel vertical diffraction gratings. 
     
     
       6. The solar cell module according to  claim 3 , a width of the rectangular hexahedron diffraction gratings is narrower than a width of the parallel horizontal diffraction gratings.